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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on building and optimizing mobile features using the React Native (Expo), TypeScript, Node.js, and Firebase ecosystem. It covers full-stack development, including complex UI animations, third-party API integrations (DeepL, SendGrid), and in-app payment management. Responsibilities include technical consulting, backend and frontend development, and ensuring quality and monitoring (Sentry, PostHog). Key libraries are TanStack Query, Zustand, react-hook-form, Reanimated, Typesense, branch.io, RevenueCat.
from: 19 August 2026
to: 18 September 2026
salary not specifiedB2B contract (full-time)
Offer parameters
level:senior
working mode:remote
Poznań, Stare Miasto
Requirements
Expected technologies
React Native
Node.js
PostgreSQL
MySQL
Optional technologies
AWS
Docker
Our requirements
- Senior-level Expertise: Deep, hands-on production experience with React Native (including the Expo framework) and the modern Node.js ecosystem.
- Backend Mastery: Solid experience with Firebase services, core Node.js fundamentals, and relational databases (PostgreSQL, MySQL).
- Targeted Library Mastery: You don't just know React Native; you have deep, practical experience with our exact ecosystem. You are fluent in TanStack Query and Zustand for state/data, react-hook-form, Reanimated for UI, Typesense for search, branch.io for deep linking, and RevenueCat for monetisation.
- The "Consultant" Mindset: Excellent English communication skills (min. B2/C1+) to efficiently articulate technical decisions to non-technical stakeholders and peers, ensuring minimal management overhead.
Optional
- Practical experience with AI-powered development tools (e.g., Cursor, GitHub Copilot) to enhance coding efficiency.
- Familiarity with targeted libraries for monetisation (e.g., RevenueCat) and advanced search functionalities (e.g., Typesense).
- Experience with Cloud & DevOps workflows (AWS, Docker, CI/CD).
Your responsibilities
- Mobile & Backend Ownership: Build, refine, and optimise mobile features using React Native (Expo) and TypeScript, while ensuring scalable backend services within the Node.js and Firebase ecosystem.
- Architecture & Integrations: Implement complex mobile UI animations, in-app purchases, and third-party API integrations (such as DeepL and SendGrid).
- Consulting & Communication: Translate complex technical requirements into business value, collaborate directly with stakeholders, and advise on key technical decisions.
- Quality & Analytics: Ensure smooth application performance and error tracking using tools like Sentry and PostHog, while establishing shared standards and raising the bar for the entire team.
About the project
Are you a battle-tested developer who thrives at the intersection of robust backend logic and seamless frontend experiences? We are looking for an experienced full-stack expert for a fast-paced, short-term assignment to act as a bridge between technology and business.
In this role, you will jump straight into an active codebase, advising clients and shaping technical roadmaps while rapidly delivering high-quality mobile features.
What we offer
- Remote-First Flexibility: Stay where you feel most productive. Here’s a remote-first environment with the freedom to set your own schedule. Whether you need a midday break or a specific routine, we trust you to manage your time and deliver results while maintaining your personal well-being.
- Collaboration Mindset: Facing a complex challenge? At STX Next, you collaborate with true enthusiasts and experts who prioritize professional support and direct, honest feedback.
- Tech Events: Gain access to specialized knowledge through bootcamps, Strategic Skills Labs, and Tech Knowledge Hubs focused on AI, Data, and Cloud. Beyond our internal webinars and technical materials, we host branded meetups like DevDuck and PAIDA.
Recruitment stages
- 1.Application
- 2.Screening Call
- 3.Technical Interview
- 4.Hiring Manager / Culture Fit Interview
- 5.Feedback & Offer
STX Next S.A.
Hi there!
We are STX Next, a global IT consulting company specializing in customer-focused software services. Join a group of 500 professionals dedicated to helping customers build outstanding products. Leveraging the latest advancements in the field, and a passion for innovation, we're shaping the future of technology one project at a time.
Are you the NEXT one?
Senior Full-Stack Developer (React Native & Node.js)
I apply to:
STX Next S.A.
Poznań, Stare Miasto
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